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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 677 · 40 sums
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The method (Know the totals): Acute < 90°, right = 90°, obtuse between 90° and 180°, straight = 180°. On a straight line: the two angles add up to 180°. In a triangle: the three angles add up to 180°. Around a point: 360°. Clock: each hour mark is 30° apart (360° ÷ 12).

NameDateTime takenScore ___ / 40
  1. 1.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 40° and 125°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  5. 5.Two angles of a triangle are 85° and 65°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  10. 10.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  11. 11.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  14. 14.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  15. 15.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 50° and 100°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 60° and 60°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 55° and 35°. What is the third angle (in degrees)?
  25. 25.An angle measures 155°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  26. 26.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  27. 27.Two angles of a triangle are 85° and 90°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 70° and 90°. What is the third angle (in degrees)?
  29. 29.An angle measures 75°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  30. 30.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  31. 31.Two angles of a triangle are 35° and 55°. What is the third angle (in degrees)?
  32. 32.An angle measures 25°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  33. 33.Three angles meet at a point. Two of them are 130° and 120°. What is the third angle (in degrees)?
  34. 34.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  35. 35.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 75° and 50°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 35° and 40°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 65° and 110°. What is the third angle (in degrees)?

Answer key

  1. 70
  2. 15
  3. 75
  4. 120
  5. 30
  6. 90
  7. 60
  8. 80
  9. 90
  10. Acute
  11. 170
  12. 20
  13. 180
  14. Straight
  15. 165
  16. 15
  17. 45
  18. 30
  19. 60
  20. 30
  21. 50
  22. 155
  23. 60
  24. 90
  25. Obtuse
  26. 150
  27. 5
  28. 20
  29. Acute
  30. 120
  31. 90
  32. Acute
  33. 110
  34. Acute
  35. 180
  36. 150
  37. 55
  38. 105
  39. 120
  40. 5

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